add basic structure for additional features documentation

Setting the raw frame with overview, short descriptions like in code
and already revealing skill levels.

Based on the current (recently modified) structure of the feature settings.

Detailed descriptions in work and coming with later commits as well as
a dedicated admin section for that topic. Better menu integration
may be possible with Andrew's new doco structure work in progress later.

1 files changed, 57 insertions, 0 deletions

diff --git a/doc/feature/additional/filtering.md b/doc/feature/additional/filtering.md
new file mode 100644
index 000000000..ba8e1e29f
--- /dev/null
+++ b/doc/feature/additional/filtering.md
@@ -0,0 +1,57 @@
+## Network and Stream Filtering
+
+
+### Search by Date
+
+Ability to select posts by date ranges
+<!-- TODO: full description for Search by Date -->
+
+Minimum required technical skill level to see this feature: 1
+
+
+### Saved Searches
+
+Save search terms for re-use
+<!-- TODO: full description for Saved Searches -->
+
+Minimum required technical skill level to see this feature: 2
+
+
+### Network Personal Tab
+
+Enable tab to display only Network posts that you've interacted on
+<!-- TODO: full description for Network Personal Tab -->
+
+Minimum required technical skill level to see this feature: 1
+
+
+### Network New Tab
+
+Enable tab to display all new Network activity
+<!-- TODO: full description for Network New Tab -->
+
+Minimum required technical skill level to see this feature: 2
+
+
+### Affinity Tool
+
+Filter stream activity by depth of relationships
+<!-- TODO: full description for Affinity Tool -->
+
+Minimum required technical skill level to see this feature: 1
+
+
+### Suggest Channels
+
+Show friend and connection suggestions
+<!-- TODO: full description for Suggest Channels -->
+
+Minimum required technical skill level to see this feature: 1
+
+
+### Connection Filtering
+
+Filter incoming posts from connections based on keywords/content
+<!-- TODO: full description for Connection Filtering -->
+
+Minimum required technical skill level to see this feature: 3